My wife and I are NOT country music fans, so many of the exhibits and names meant nothing to us. there are a lot of costumes and instruments on display with placards telling you who they belonged to/where they were used.
We added the RCA Studio B tour to our visit - this was quite disappointing. It was mostly the tour guide telling stories of various music people and playing clips of her favorite songs. Once arriving at the studio, we had to sit in the lobby area for 20 minutes of this 9and a short video), then quickly zipped past the other rooms and into the studio where everyone got to pose at the piano, we heard a few more clips of music, then right out the exit door and back on the bus.
Total time for our visit, including the studio tour, was 2-1/2 hours. Of course true country music fans could spend many more hours reading about all the things on display.